One way membrane



FIG. 1 is a top, rear, right side perspective view of a one way membrane showing my new design;

FIG. 2 is a top plan view thereof;

FIG. 3 is a bottom plan view thereof;

FIG. 4 is a front elevational view thereof; and,

FIG. 5 is a right side elevational view thereof, the left side elevational view being a mirror image thereof.

The broken lines are for environmental purposes only and form no part of the claimed design. 

CLAIM The ornamental design for a one way membrane, as shown and described. 